A serving of cereal contains 90mg potassium. If there are 22 servings in a box how many moles of Potassium are present in the cereal in the box
To calculate the number of moles of potassium in the cereal, we need to know the molar mass of potassium.
The molar mass of potassium (K) is approximately 39.10 grams/mol.
First, let's find the mass of potassium in the cereal box:
Mass of potassium = 90 mg x 22 servings = 1980 mg
To convert this mass to grams:
Mass of potassium = 1980 mg ÷ 1000 = 1.98 grams
Now, let's calculate the number of moles using the molar mass:
Number of moles = Mass of potassium / Molar mass of potassium
Number of moles = 1.98 g / 39.10 g/mol
Number of moles ≈ 0.0505 moles
Therefore, there are approximately 0.0505 moles of potassium present in the cereal in the box.
To calculate the number of moles of potassium present in the cereal box, we'll need to use the molar mass of potassium (K) and the given amount of potassium in milligrams (mg).
First, let's determine the molar mass of potassium. The atomic mass of potassium (K) is approximately 39.10 grams per mole (g/mol).
Next, we'll convert the given amount of potassium from milligrams (mg) to grams (g). Since 1 gram is equal to 1000 milligrams, we can divide 90 mg by 1000 to obtain the amount in grams:
90 mg ÷ 1000 = 0.09 g
Now, we can calculate the number of moles of potassium using the formula:
moles = mass (in grams) / molar mass
moles = 0.09 g / 39.10 g/mol
moles ≈ 0.00230 mol
Therefore, there are approximately 0.00230 moles of potassium present in the cereal box containing 22 servings.
22 servings/box x 90 mg K/serving = ? mg K/box.
Convert to g.
Convert to mols. mols = grams/atomic mass = ?